1. Goguen J., Thatcher J., Wagner E., “An Initial Algebra approach to the specification, correctness, and implementation of abstract data types” in Current Trends in Programming Methodology, Vol. 4, Yeh Ed. Prentice Hall, 1978.
2. Bauer F.L., “From Specifications to Machine Codes Program Construction through Formal Reasoning” 6th. International Conference on Software Engineering, Tokyo, Sept. 1982.
3. Burstall R., Goguen J., “The semantics of CLEAR, A Specification Language” in Abstract Software Specifications, D. Bjorner Ed., LNCS 86, Springer Verlag, 1979.
4. Boisson F., Guiho G., Pavot D., “Algebres a Operateurs Multicibles” Rapport LRI 132, Orsay, June 1983.
5. BRD 83] Broy M. “Algebraic Methods for Program Construction: The Project CIP”, in this volume.